The Photovoltaic Performance of CdS/Cu2S (QD) Co-Sensitized Solar Cell
The performance of CdS/Cu2S co-sensitized quantum dot solar cell (QDSSCs) is studied. CdS quantum dots (QDs) were adsorbed onto TiO2 using Successive Ionic Layer Adsorption and Reaction (SILAR) method for different cycles (2, 4, 6, 8 and 10). The Cu2S QDs were deposited onto TiO2/CdS10 cycle photoanodes using the same method. The FTO counter electrodes were coated with platinum, while the electrolyte containing polysulfide redox species was sandwiched between the two electrodes. The current density- voltage (J-V) characteristic curves of the assembled QDSSCs were measured at different cycles and AM 1.5 simulated sunlight. The value of current density (Jsc) and conversion efficiency (η) of TiO2/CdS/Cu2S are 252% larger than the TiO2/CdS values. The maximum values of Jsc and η are 3.56 mA/cm2 and 1.21% respectively corresponding to CdS10/Cu2S for 6 cycles of Cu2S.
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